New Rene Herse Nivex Derailleur

[bicycletricycle]

Originally Posted by Mark McM

Looking closer at the photos, I think you're right, the RH derailleur parallogram is slanted (but probably not as much as the Suntour). The Suntour also has an angle adjustment, which can raise and lower the cage to help adjust the chain gap. I would think that the RH derailleur could benefit if the frame had horizontal dropouts, to adjust the cassette position relative to the derailleur.

because of tight limit on cassette sizing I would imagine there is a known optimal distance to the derailleur mount. Hopefully the builder follows the directions

[72gmc]

Originally Posted by bicycletricycle

because of tight limit on cassette sizing I would imagine there is a known optimal distance to the derailleur mount. Hopefully the builder follows the directions

I wonder if the tab could house a short vertical slot, not unlike a FD braze-on. A bit of range for different cassettes.

[bicycletricycle]

Originally Posted by 72gmc

I wonder if the tab could house a short vertical slot, not unlike a FD braze-on. A bit of range for different cassettes.

in this design it looks like most/all of the cassette tracing is coming from the parallelogram geometry so being able to move it in that dimension would do much. You could slide it forward and maybe make room for a larger cassette but you would increase the gap in the small cogs. This would probably still work but who knows, it looks like the derailleur already has a pretty large gap to the cog. I assume they did plenty of testing and in the end like this solution best.

The mount looks like it sort of sandwiches the derailleur between two plate that are perpendicular to the stay, you could braze them farther apart from each other and make some spacers to achieve some adjustment.

I would probably just use it as suggested. 11-30 with a 30-44 on the front is plenty for me.